1.6 Limestone

Which of the following is an advantage of quarrying for limestone?

• It provides raw materials for construction.

• It reduces air pollution.

• It increases green cover.

• It prevents soil erosion.

Which of the following correctly describes the sequence of reactions produced in the laboratory to convert limestone into slaked lime?

• Limestone → Quicklime → Slaked lime

• Limestone → Slaked lime → Quicklime

• Slaked lime → Limestone → Quicklime

• Quicklime → Limestone → Slaked lime

Fill in the blank: The chemical formula for limestone is ________.

• CaCO3

• NaCl

• K2SO4

• MgO

Fill in the blank: The chemical name for quicklime is ________.

• calcium oxide

• calcium carbonate

• magnesium oxide

• sodium chloride

Fill in the blank: The chemical formula for slaked lime is ________.

• Ca(OH)2

• CaCO3

• CaO

• NaOH

Which of the following is NOT an advantage of quarrying for limestone?

• Provides materials for the construction industry

• More local jobs

• Spoils the landscape

• Creates more wealth for the community

Which gas is produced when calcium carbonate is heated during thermal decomposition?

• Oxygen

• Carbon dioxide

• Nitrogen

• Hydrogen

What observation indicates the presence of carbon dioxide when bubbled through limewater?

• Limewater turns blue

• Limewater turns milky

• Limewater turns red

• Limewater turns green

Match the common name with its chemical name and chemical formula:

• Calcium carbonate

• Limestone

• Calcium oxide

• Slaked lime

• Calcium hydroxide

• Quicklime

Fill in the blank: During the reaction of quicklime with water, the product formed is ________.

• calcium hydroxide (slaked lime)

• calcium carbonate

• magnesium oxide

• sodium chloride